JP5529688B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article containing a skin care agent on its surface.

Absorbent articles such as disposable diapers and sanitary napkins may cause blurring when worn for long periods of time or used by people with weak skin. For this reason, various proposals have been made to apply a skin care agent for suppressing fog to the skin contact surface of an absorbent article (see, for example, Patent Documents 1 to 5).
However, if the skin care agent is added before processing the raw cotton into a non-woven fabric, there will be a skin care agent in addition to the skin contact surface of the absorbent article, and skin care that touches the skin compared to the amount of applied skin care agent The amount of agent will be reduced.
In addition, a method of applying a skin care agent to the skin contact surface of an absorbent article has also been proposed, but the skin care agent does not stay on the skin contact surface during application, and the skin care agent on the skin side falls out to the back side. There is a problem that the amount of the skin care agent in contact with the skin is less than the set value.
Furthermore, a method of applying a fixing agent for fixing the skin care agent to the skin contact surface is also known, but it is not desirable because there is a risk of skin irritation by the fixing agent and a decrease in flexibility.

JP 2000-110067 A JP 2008-086504 A JP-T-2006-519320 Japanese National Patent Publication No. 11-510082 JP 2009-5860 A

  Therefore, the main problem of the present invention is that, without using a fixing agent, the addition and movement of a skin care agent to a useless part is reduced, and many of the added skin care agents can be brought into contact with the skin, thereby making skin care more efficient. It is in providing the absorbent article which can use an agent.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
It comprises a skin contact sheet made of a nonwoven fabric and a back side member provided on the back side of the skin contact sheet,
The skin contact sheet contains a skin care agent, and a large number of protrusions having a convex surface and a concave back surface are provided at intervals, and the skin care agent is not contained in the portion between the protrusions or the protrusions. Containing a smaller amount of skin care agent than the part, the surface is concave and the back is convex, a large number of depressions are provided,
The skin contact sheet is spaced apart from the back side member at the protruding portion, and is in contact with the back side member at the recess.
An absorbent article characterized by the above.

(Function and effect)
In this invention, since the skin care agent is contained in the protrusion part which is easy to contact skin in a skin contact sheet, a skin care agent can be made to contact skin more reliably. In addition, since the skin contact sheet does not contain the skin care agent or contains a smaller amount of skin care agent than the protruding part, the use of the skin care agent on the part that is difficult to contact the skin is avoided. Can be reduced. And since the protrusion part of the skin contact sheet is spaced apart from the back side sheet | seat and the skin care agent contained in a protrusion part is difficult to slip through, many added skin care agents can be contacted with skin. On the other hand, since the hollow part of the skin contact sheet is in contact with the back side member, excrement and the like are efficiently delivered to the back side member through the hollow part of the skin contact sheet.

<Invention of Claim 2>
The absorbent article of Claim 1 whose fiber density of the said protrusion part is higher than the fiber density of the said hollow part.

(Function and effect)
As described above, the fiber density of the protruding portion is higher than the fiber density of the recessed portion, so that the holding power of the skin care agent in the protruding portion is improved, and it is difficult for the back-through and movement to the surroundings (recessed portion) to occur. preferable.

<Invention of Claim 3>
The absorbent article according to claim 2, wherein the skin contact sheet does not contain a fixing agent for fixing the skin care agent to fibers.

(Function and effect)
The skin contact sheet may contain a fixing agent. However, as described above, there is a risk of skin irritation caused by the fixing agent and a decrease in flexibility.

<Invention of Claim 4>
A liquid-permeable surface sheet, a liquid-impermeable sheet, and an absorber provided therebetween,
The absorptive article according to claim 2 in which said skin contact sheet is said surface sheet, and said skin care agent is hydrophobic.

(Function and effect)
When the skin contact sheet is a surface sheet, the surface sheet contains a skin care agent. In this case, if the skin care agent is hydrophobic, such as an oil agent, the liquid permeability may decrease. Moreover, liquid permeability falls also in the part spaced apart from the back side member like the protrusion part of this invention. However, in the present invention, since the skin care agent is not simply contained but a skin care agent-free or low-content recess is provided, the excrement is transferred to the back side through the recess and is liquid permeable. Can be suppressed.

<Invention of Claim 5>
The surface sheet is provided with a plurality of linear skin care agent-containing regions extending in the front-rear direction at intervals in the width direction,
The absorbent article according to claim 4, wherein at least the protrusions are provided at least in the skin care agent-containing region, and at least the depressions are provided between the skin care agent-containing regions.

(Function and effect)
Skin care agents more or less reduce liquid permeability. Therefore, by reversely using this property, as described above, the linear skin care agent-containing regions extending in the front-rear direction are alternately provided in the width direction, and the excrement is moved back and forth by the liquid permeability lowering function of the skin care agent. It is also preferable to adopt an absorption structure that delivers excrement to the back side through the recess while diffusing in the direction.

<Invention of Claim 6>
The absorbent article according to claim 4 or 5, wherein a skin care agent is contained in at least a portion along the circumference of the leg of the surface sheet, and at least a plurality of the protrusions are provided in at least the skin care agent-containing region.

(Function and effect)
Since the portion along the leg circumference in the surface sheet is a portion where skin troubles such as rash easily occur due to friction with the skin, it is preferable to provide a skin care agent-containing region at least in this portion.

<Invention of Claim 7>
The absorption according to any one of claims 4 to 6, wherein a skin care agent is contained in at least a waist side end portion of the surface sheet, and at least a large number of the protrusions are provided in at least the skin care agent-containing region. Sex goods.

(Function and effect)
Since the waist-side end portion of the topsheet is a portion where skin troubles such as rash easily occur due to friction with the skin, it is preferable to provide a skin care agent-containing region at least in this portion.

  As described above, according to the present invention, the addition and transfer of a skin care agent to a useless part can be reduced without using a fixing agent, and a lot of the added skin care agent can be brought into contact with the skin. Advantages such as an absorbent article in which a skin care agent can be used are brought about.

It is a top view in the state where the diaper was developed showing the inner surface of a tape type disposable diaper. It is a top view in the state where the diaper was developed showing the outer surface of a tape type disposable diaper. FIG. 6 is a sectional view taken along line 6-6 of FIG. FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 1. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 1. FIG. 9 is a sectional view taken along line 9-9 in FIG. 1. It is an expanded sectional view of the principal part. It is a top view in the state where a diaper was developed showing an inner surface of a tape type disposable diaper of other forms. It is a top view in the state where a diaper was developed showing an inner surface of a tape type disposable diaper of other forms. It is a top view in the state where a diaper was developed showing an inner surface of a tape type disposable diaper of other forms.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, “front-rear direction (vertical direction)” means a direction connecting the ventral side (front side) and back side (rear side), and “width direction” means a direction (left-right direction) perpendicular to the front-rear direction. "Vertical direction" means the wearing state of the diaper, that is, the width when the diaper is folded in two at the crotch so that the both sides of the diaper and the back part of the diaper overlap each other It means the direction orthogonal to the direction.

  1-6 has shown an example of the tape type disposable diaper. 3 and 4 are views showing a cross section taken along line 6-6 and 7-7 in FIG. 1, respectively, and FIGS. 5 and 6 are cross sections taken along line 8-8 and 9-9 in FIG. FIG. This tape-type disposable diaper is a part that extends from the lower abdomen through the crotch part to cover the buttocks along the center in the width direction, and the liquid-permeable surface sheet 30 that forms the body-side surface, and the outer surface An absorbent main body 10 which is a part where the absorbent element 50 is interposed between the liquid-impermeable sheet 11 located on the side and a part extending to the front side and the rear side of the absorbent main body part 10 respectively. And a ventral end flap part FE and a dorsal end flap part BE, which are parts that do not have the absorbent element 50.

  The tape-type disposable diaper includes a pair of abdominal side flap portions FF, FF extending to the outside in the width direction from the crotch portion C on both sides of the upper edge F1 side portion of the abdominal side F, and a back side B. On both sides of the upper edge B1 side portion, a pair of back side flap portions BF, BF extending to the outside in the width direction from the crotch portion C are provided. Moreover, the fastening tape 13 as a locking member is provided in the back side flap part BF and BF, respectively.

  More specifically, the entire outer surface of the absorbent main body 10 and the side flap portions BF and FF on the back side and the abdomen side is formed by the exterior sheet 12. In particular, in the absorbent main body 10, a liquid-impermeable sheet 11 is fixed to the inner surface side of the exterior sheet 12 with an adhesive such as a hot-melt adhesive, and an absorbent element is further disposed on the inner surface side of the liquid-impermeable sheet 11. 50, the intermediate sheet 40, and the top sheet 30 are laminated in this order. The top sheet 30 and the liquid-impermeable sheet 11 are rectangular in the illustrated example, have a slightly larger dimension in the front-rear direction and the width direction than the absorbent element 50, and are eaten from the side edges of the absorbent element 50 in the top sheet 30. The peripheral edge that protrudes and the peripheral edge that protrudes from the side edge of the absorbent element 50 in the liquid-impermeable sheet 11 are fixed by a hot melt adhesive or the like. The liquid-impermeable sheet 11 is made of a moisture-permeable polyethylene film or the like, and is formed to be slightly wider than the top sheet 30.

  Further, side barrier cuffs 60, 60 projecting (standing) on the skin side of the wearer are provided on both sides of the absorbent main body 10, and a barrier sheet forming the side barrier cuffs 60, 60 is provided. 62 and 62 are extended over the whole width direction outer side of the absorptive main-body part 10 including the inner surface of each side flap part BF and FF of back side and abdominal side.

Hereinafter, the material and characteristic parts of each part will be described in order (exterior sheet).
The exterior sheet 12 is a part that supports the absorbent element 50 and is attached to the wearer. The exterior sheet 12 has an hourglass shape in which the center portions in the front-rear direction on both sides are constricted, and the constricted portions serve as portions for putting the wearer's legs.

The exterior sheet 12 is preferably a non-woven fabric, but is not limited thereto. The type of the nonwoven fabric is not particularly limited, and as the material fiber, for example, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester or polyamide, recycled fibers such as rayon or cupra, and natural fibers such as cotton are used. As a processing method, a spunlace method, a spunbond method, a thermal bond method, an air-through method, a needle punch method, or the like can be used. However, a long-fiber nonwoven fabric such as a spunbond nonwoven fabric, an SMS nonwoven fabric, or an SMMS nonwoven fabric is preferable in that both the touch and strength can be achieved. In addition to using a single nonwoven fabric, a plurality of nonwoven fabrics can be used. In the latter case, the nonwoven fabrics 12 are preferably bonded to each other with a hot melt adhesive or the like. When using a nonwoven fabric, the fabric weight is preferably 10 to 50 g / m ² , particularly 15 to 30 g / m ² .

(Liquid impervious sheet)
The material of the liquid-impermeable sheet 11 is not particularly limited. For example, the liquid-impermeable sheet 11 is substantially made of an olefin resin such as polyethylene or polypropylene, a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet, or a waterproof film. Non-woven fabrics that ensure liquid impermeability (in this case, liquid impervious sheets are composed of waterproof films and non-woven fabrics). Of course, in addition to this, a liquid-impermeable and moisture-permeable material that has been used and used in recent years from the viewpoint of preventing stuffiness can also be exemplified. As the sheet of the material having liquid impermeability and moisture permeability, for example, an inorganic filler is kneaded in an olefin resin such as polyethylene or polypropylene, and the sheet is formed, and then stretched in a uniaxial or biaxial direction. Examples of the microporous sheet obtained in this way can be given. In addition, non-woven fabric using micro-denier fiber, strengthening leak-proofing by reducing the voids of the fiber by applying heat or pressure, and applying water-absorbing resin or hydrophobic resin or water repellent. A sheet that is liquid-impermeable without using a film can also be used as the liquid-impermeable sheet 11.

(Surface sheet)
As the top sheet 30, a porous or non-porous nonwoven fabric having liquid permeability is used. What is the raw material fiber of this nonwoven fabric is not particularly limited. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers using two or more of them. Etc. can be illustrated. Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method. For example, the spun lace method is a preferable processing method for obtaining flexibility and drapeability, and the thermal bond method is for obtaining bulkiness and softness.

  Further, the top sheet 30 may be composed of one sheet or may be composed of a laminated sheet obtained by bonding two or more sheets. Similarly, the top sheet 30 may be composed of one sheet or two or more sheets in the planar direction.

(Intermediate sheet)
An intermediate sheet (also referred to as a second sheet) 40 can be provided between the surface sheet 30 and the absorbent element 50 in order to move excrement that has passed through the surface sheet 30 to the absorber and prevent reversal. This intermediate sheet 40 not only rapidly transfers the excrement to the absorbent body and enhances the absorption performance by the absorbent body 56, but also prevents the excretion of the absorbed excrement from returning from the absorbent body 56, and the surface of the topsheet 30 is touched. Is to improve. The intermediate sheet 40 can be omitted.

  As the intermediate sheet 40, the same material as that of the top sheet 30 can be used. The intermediate sheet 40 is preferably bonded to the top sheet 30. When heat embossing or ultrasonic welding is used for the bonding, the material of the intermediate sheet 40 preferably has a melting point similar to that of the top sheet 30. Further, considering the permeation of the solid content in the stool, the fineness of the fiber used for the intermediate sheet 40 is preferably 5.0 to 7.0 dtex, but the liquid residue in the top sheet 30 increases. On the other hand, when the fineness of the fiber used for the intermediate sheet 40 is 1.0 to 2.0 dtex, the liquid residue of the top sheet 30 is hardly generated, but the solid content of the stool is hardly transmitted. Therefore, it is preferable that the fiber of the nonwoven fabric used for the intermediate sheet 40 has a fineness of about 2.0 to 5.0 dtex.

  The intermediate sheet 40 in the illustrated form is arranged in the center shorter than the width of the absorbent element 50, but may be provided over the entire width. The length in the longitudinal direction of the intermediate sheet 40 may be the same as the entire length of the diaper, may be the same as the length of the absorbent element 50, or may be within a short length range centered on the region that receives the liquid.

(Side barrier cuffs)
Side barrier cuffs 60, 60 that protrude (stand up) on the use surface side are provided on both sides of the product in order to prevent urine and soft stool that move laterally on the top sheet 30 and prevent side leakage. Is preferred.

  The side barrier cuff 60 includes a barrier sheet 62 that is substantially continuous in the width direction, and an elongated elastic elastic member 63 that is fixed to the barrier sheet 62 in a stretched state along the front-rear direction. As the barrier sheet 62, a water-repellent nonwoven fabric can be used, and as the elastic elastic member 63, thread rubber or the like can be used. As shown in FIGS. 1 and 2, a plurality of elastic elastic members can be provided in addition to a plurality of elastic expansion members.

  The inner surface of the barrier sheet 62 has a fixing start end in the width direction on the side portion of the top sheet 30, and a portion on the outer side in the width direction from the fixing start end is on the side portion of the liquid-impermeable sheet 11 and on the outer side in the width direction. It fixes to the side part of the exterior sheet | seat 12 located with the hot-melt-adhesive agent etc. Out of the adhering portions, on the outer side in the width direction in the vicinity of the adhering start end, leg elastic elastic members 64 made of rubber thread or the like are provided along the front-rear direction between the sheets of the portions where the barrier sheet 62 and the exterior sheet 12 face each other. It has been.

  Around the leg, the width direction inner side of the side barrier cuff 60 is fixed on the top sheet 30 at both ends in the longitudinal direction of the product, but the portion between them is an unfixed free part. The portion comes to stand by the contraction force of the rubber thread 63. When the diaper is worn, the diaper is attached to the body in the shape of a boat, and the contraction force of the rubber thread 63 acts, so that the side barrier cuffs 60 stand up and adhere to the legs around the contraction force of the rubber thread 63. . As a result, so-called side leakage from around the legs is prevented.

  Unlike the illustrated embodiment, the front and rear direction end portions of the barrier sheet 62 on the inner side in the width direction are divided into a base end side portion extending from the outer side in the width direction to the inner side in the width direction and a center side in the width direction of the base end side portion. It is also possible to fix in a double-folded state having a distal end side portion that is folded back from the edge toward the body side and extends outward in the width direction, and the portion in between can be an unfixed free portion.

(Absorption element)
The absorption element 50 is a part that absorbs and holds liquid such as urine and loose stool. The absorbent element 50 includes an absorbent body 56 and a packaging sheet 58 that wraps at least the back and side surfaces of the absorbent body 56. The packaging sheet 58 can be omitted. The absorbent element 50 can be adhered to the inner surface of the liquid-impermeable sheet 11 via an adhesive such as a hot melt adhesive on the back surface.

(Absorber)
The absorber 56 can be formed of an aggregate of fibers. As this fiber assembly, a filament assembly obtained by opening as necessary a synthetic fiber tow (fiber bundle) such as cellulose acetate, in addition to those obtained by stacking short fibers such as cotton-like pulp and synthetic fibers Can also be used. The fiber basis weight can be set to, for example, about 100 to 300 g / m ² when cotton-like pulp or short fibers are stacked, and in the case of a filament aggregate, for example, about 30 to 120 g / m ^2. Can do. The fineness in the case of a synthetic fiber is 1-16 dtex, for example, Preferably it is 1-10 dtex, More preferably, it is 1-5 dtex. In the case of a filament aggregate, the filament may be a non-crimped fiber, but is preferably a crimped fiber. The crimped degree of the crimped fiber can be, for example, 5 to 75, preferably 10 to 50, and more preferably about 15 to 50 per inch. Further, a crimped fiber that is uniformly crimped is often used.

(Superabsorbent polymer particles)
The absorbent body 56 preferably includes superabsorbent polymer particles. In particular, at least in the liquid receiving region, the superabsorbent polymer particles (SAP particles) are dispersed substantially throughout the thickness direction with respect to the aggregate of fibers. Is desirable.

  If there is no SAP particle in the upper part, the lower part, and the middle part of the absorber 56, or if there is very little, it cannot be said that the "absorbed throughout the thickness direction". Therefore, “distributed in the entire thickness direction” means “distributed unevenly in the upper part, the lower part, and / or the middle part of the aggregate of fibers in addition to the form“ uniformly ”distributed in the entire thickness direction. However, it is still included in the form of being dispersed in the upper, lower and middle portions. Further, a form in which some SAP particles do not enter the fiber assembly and remain on the surface thereof, and a form in which some SAP particles pass through the fiber assembly and are on the packaging sheet 58 are also excluded. It is not something.

  Superabsorbent polymer particles include “powder” in addition to “particles”. As the particle diameter of the superabsorbent polymer particles, those used in this type of absorbent article can be used as they are, and those having a particle size of 1000 μm or less, particularly 150 to 400 μm are desirable. The material of the superabsorbent polymer particles can be used without any particular limitation, but those having a water absorption of 40 g / g or more are suitable. High-absorbent polymer particles include starch-based, cellulose-based, and synthetic polymer-based starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, and sodium carboxymethylcellulose crosslinks. Or an acrylic acid (salt) polymer can be used. As the shape of the superabsorbent polymer particles, a commonly used granular material is suitable, but other shapes can also be used.

  As the superabsorbent polymer particles, those having a water absorption rate of 40 seconds or less are preferably used. When the water absorption speed exceeds 40 seconds, so-called reversion in which the liquid supplied into the absorber 56 returns to the outside of the absorber 56 is likely to occur.

The basis weight of the superabsorbent polymer particles can be appropriately determined according to the amount of absorption required for the use of the absorber 56. Therefore, although it cannot be said unconditionally, it can be set to 50 to 350 g / m ² . If the amount of polymer is less than 50 g / m ^2, it is difficult to secure the absorption amount. When it exceeds 350 g / m ² , not only the effect is saturated, but also the sensation of incongruity due to the excess of the superabsorbent polymer particles is given.

(Packaging sheet)
When the packaging sheet 58 is used, as the material, tissue paper, particularly crepe paper, non-woven fabric, polylaminated non-woven fabric, a sheet with small holes, or the like can be used. However, it is desirable that the superabsorbent polymer particles be a sheet that does not escape. When a nonwoven fabric is used in place of the crepe paper, a hydrophilic SMMS (spunbond / meltblown / meltblown / spunbond) nonwoven fabric is particularly suitable, and polypropylene, polyethylene / polypropylene, etc. can be used as the material. The fiber basis weight is preferably 5 to 40 g / m ² , particularly 10 to 30 g / m ² .

  As shown in FIG. 3, the packaging sheet 58 may wrap only the back surface and the side surface of the layer in addition to the form for wrapping the entire absorbent body 56. Although not shown, only the upper and side surfaces of the absorbent body 56 are covered with crepe paper or a nonwoven fabric, and the lower surface is covered with a liquid-impermeable sheet such as polyethylene, and the upper surface of the absorbent body 56 is covered with crepe paper or a nonwoven fabric. For example, the lower surface may be covered with a liquid-impermeable sheet such as polyethylene (each of these materials is a component of the packaging sheet). If necessary, the absorbent body 56 may be sandwiched between two upper and lower sheets or disposed only on the lower surface, but this is not desirable because it is difficult to prevent the movement of the superabsorbent polymer particles.

(Fastening tape)
As shown in FIGS. 1 and 2, the fastening tape 13 has a base portion of a sheet base material 13C made of a nonwoven fabric, a plastic film, a polylaminated nonwoven fabric, paper or a composite material thereof attached to the diaper and protrudes from the diaper. A hook material 13 </ b> A of a mechanical fastener is provided as a locking portion for the ventral side at the distal end side portion. The hook material 13A is joined to the sheet base 13C with an adhesive so as not to be peeled off.

  In the diaper for infants, among the dimensions of the attachment portion of the fastening tape 13, the width direction length X1 of the diaper is preferably 10 to 50 mm, particularly preferably 20 to 40 mm, and the length Y1 in the front-rear direction is 20 to 100 mm. In particular, the thickness is preferably 40 to 80 mm. Of the dimensions of the front end side portion of the fastening tape 13, the length of the diaper in the width direction is preferably 30 to 80 mm, particularly preferably 40 to 60 mm, and the length (height) in the front-rear direction is 20 to 70 mm. In particular, the thickness is preferably 25 to 50 mm. In addition, when a part or all of the fastening tape 13 has a substantially tapered shape, for example, and the length in the front-rear direction and the length in the width direction are not constant, the numerical range is determined by an average value. The fastening tape 13 may have a symmetrical shape such as a rectangular shape. However, if the fastening tape 13 is a convex shape composed of a wide attachment portion and an elongated tip side portion, the grip portion on the tip side portion can be easily picked and This is preferable because the tension between the bases of this region acts over a wide range. The hook member 13A has a large number of engaging protrusions on the outer surface side. The shape of the engaging protrusion is (A) Le-shaped, (B) J-shaped, (C) Mushroom-shaped, (D) T-shaped, (E) Double J-shaped (J-shaped And the like may be any shape. Instead of the hook material 13 </ b> A, an adhesive material layer can be provided as a locking portion of the fastening tape 13.

  When the diaper is mounted, the fastening tape is locked at a proper position on the outer surface of the abdominal side F with the back side flap portion BF being overlapped on the outside of the abdominal side flap portion FF. The position and size of the fastening portion of the fastening tape 13 can be arbitrarily determined. In diapers for infants, the locking location is a rectangular range of 20 to 80 mm in the front-rear direction and 150 to 300 mm in the width direction, and the distance in the height direction between the upper edge and the ventral upper edge is 0 to 60 mm, particularly 20 to 50 mm. And the center in the width direction of the product.

  When the fastening tape 13 is attached so that the attachment portion of the fastening tape 13 overlaps the boundary line between the back end flap portion BE and the absorbent element 50, the tension acting between the attachment portions of the left and right fastening tapes 13 when the diaper is attached. This is preferable because the back side end of the absorbent element 50 is firmly pressed against the body. Moreover, if the attachment part of the fastening tape 13 is too far from the back side end part (rear end part) of the diaper, the tension acting between the attachment parts of the left and right fastening tapes 13 when the diaper is mounted is the back side end part of the diaper. Therefore, a gap is likely to occur between the back end of the diaper and the body surface. Therefore, the length in the front-rear direction of the back end flap BE is preferably the same as or shorter than the length in the front-rear direction of the base portion of the fastening tape 13.

(Target sheet)
The locking portion of the fastening tape 13 in the ventral F, preferably provided with a target sheet 74 having a target to facilitate locking. As the target sheet 74, when the hook portion is the hook material 13 </ b> A, a target sheet 74 can be used in which a large number of loop yarns are formed on the surface of a sheet base material made of a plastic film or a nonwoven fabric so that the engagement protrusions of the hook material are entangled. In the case of an adhesive material layer, a sheet base material made of a plastic film having a smooth surface that is rich in adhesiveness can be used . Also, if the engaging portion of the fastening tape 13 in the ventral F consists of a nonwoven fabric, for example, the outer sheet 12 of the illustrated embodiment is a case made of non-woven fabric, when the engaging portion of the fastening tape 13 of the hook member 13A Can omit the target sheet 74 and entangle the hook material 13A with the nonwoven fabric of the exterior sheet 12 to be locked. In this case, the target sheet 74 may be provided between the exterior sheet 12 and the liquid-impermeable sheet 11.

(End flap)
The end flap part is a part that extends to the front side and the rear side of the absorbent main body 10 and does not have the absorbent element 50, and the front extension part is the ventral end flap part FE. The extended portion on the rear side is the back end flap portion BE.

  The length in the front-rear direction of the back end flap BE is preferably the same as or shorter than the length in the front-rear direction of the attachment portion of the fastening tape 13, and if the back end of the diaper and the absorbent element 50 are too close to each other. Since the gap between the dorsal side end of the diaper and the body surface is likely to occur due to the thickness and stiffness of the absorbent element 50, the thickness is preferably 10 mm or more.

  The length in the front-rear direction of the ventral end flap part FE and the back end flap part BE is preferably about 5 to 20% of the length L in the front-rear direction of the whole diaper. In particular, a thickness of 20 to 50 mm is appropriate.

(Back elastic sheet)
In the illustrated form, a belt-like back-side elastic sheet 70 that elastically expands and contracts in the width direction is provided between the fastening tapes 13 to improve the fit in the diaper back side. Both end portions of the back-side elastic sheet 70 are preferably extended to a portion that overlaps with the attachment portions of both fastening tapes 13, but may be separated to the center in the width direction. The back-and-forth stretchable sheet 70 has a front-rear dimension that is approximately the same as the front-rear dimension of the attachment portion of the fastening tape 13, but may have a dimensional difference of about ± 20%. Further, when the back elastic sheet 70 is arranged so as to overlap the boundary line between the back end flap BE and the absorbent element 50 as shown, the back end of the absorbent element 50 is firmly pressed against the body. Therefore, it is preferable. The back-side elastic sheet 70 may use a sheet-like elastic member such as a rubber sheet, but it is preferable to use a nonwoven fabric or paper from the viewpoint of air permeability. In this case, a sheet-like elastic member having air permeability such as a stretchable nonwoven fabric can be used. However, as shown in FIG. 5, the sheet base material 71 such as two nonwoven fabrics is bonded with an adhesive such as a hot melt adhesive. Preferably, the elastic stretch member 72 such as a perforated sheet, net, or elongated (thread or string) is fixed in a stretched state in the width direction between the sheet bases 71. Used. As the sheet base 71 in this case, the same one as the exterior sheet 12 can be used. It is preferable that the elastic expansion / contraction member 72 has an extension ratio of about 150 to 250%. In addition, when an elongated (stretch or string-like) member is used as the elastic elastic member 72, it is preferable to provide about 5 to 15 members having a thickness of 420 to 1120 dtex at intervals 72d of 3 to 10 mm.

  In addition, it is preferable that a part of the elastic expansion / contraction member 72 is arranged so as to cross the absorbent element 50 as shown in the figure because the fitting property of the absorption element 50 is improved, but in this case, the elastic expansion / contraction member 72 is used. If the contraction force is prevented from acting on a part or all of the overlapping portion by means such as cutting, the back end of the absorbent element 50 does not contract in the width direction, so that the fit is further improved.

  The elastic elastic member 72 may be fixed over the entire length of the sheet base material 71 in the longitudinal direction of the sheet (width direction of the diaper), but in order to prevent the sheet from shrinking or curling when attached to the diaper body, In the range of about 5 to 20 mm at the end in the front-rear direction (diaper width direction), it is preferable that the contraction force does not work or the elastic elastic member 72 does not exist.

  In the illustrated embodiment, the back-side stretchable sheet 70 is sandwiched between the barrier sheet 62 and the exterior sheet 12 on both sides in the width direction of the liquid-impermeable sheet 11 and overlaps with the liquid-impermeable sheet 11. Although provided so as to be sandwiched between the permeable sheet 11 and the absorbent element 50, it may be provided between the liquid-impermeable sheet 11 and the exterior sheet 12, or provided on the outer surface of the exterior sheet 12. Alternatively, it may be provided between the top sheet 30 and the absorbent element 50. Further, the back-side elastic sheet 70 may be provided on the top sheet 30, and in this case, it may be provided on the barrier sheet 62 on both sides in the width direction of the liquid-impermeable sheet 11. Further, when the exterior sheet 12 is formed by stacking a plurality of sheet base materials, the entire back-side stretchable sheet 70 may be provided between the sheet base materials of the exterior sheet 12.

(indicator)
An indicator 80 that is colored or decolored according to the liquid content of the excrement can be provided at a portion that can come into contact with the liquid content of the excrement. The indicator 80 is colored by a colorant that shows a color reaction by contact with moisture such as body fluid and / or a colorant that shows a color reaction by detecting pH in the water, or a reaction with body fluid. The reaction that disappears, the colorant dissolves (disperses) in the urine, disperses or disappears, the ink or adhesive containing the drug showing other visual changes, or the contact with water or body fluid It is comprised by the sheet-like member containing the chemical | medical agent (indicator reaction means) which shows a change. For example, as a colorant that exhibits a color reaction upon contact with moisture such as a body fluid, a water-soluble, water-decomposable dye or leuco dye and a phenolic compound that develops color of the leuco dye, an acidic substance, an electron-accepting substance, etc. It is possible to use a colorant consisting of the above developer.
The color that appears by coloration is not particularly limited, but it is difficult to see the same color (usually white) as the outer surface of the diaper, so that a color that is different from the outer surface of the diaper is suitable.

  The indicator 80 composed of the above-described ink or adhesive is applied to a predetermined application region as shown in FIGS. The indicator 80 shown in FIG. 2 and FIG. 3 shows the above-described ink or adhesive application area. This region is preferably included in the arrangement range of the absorber 56, is located in the center in the width direction, has a width of about 0.3 to 14 cm, preferably about 0.5 to 2 cm, and is a diaper full length L. It is an area | region of 60-90% of this, and is an area | region where the contact with the excretion absorbed by the absorber 56 is performed efficiently. The indicator 80 may be provided at a position where it can be seen from the inner surface of the diaper or at a position where it can be seen from the three-dimensional gathers around the legs, but the back surface of the absorbent body 56 and the liquid can be seen from the outer surface of the diaper. Formed by applying an ink or an adhesive constituting the indicator 80 between the impermeable sheet 11, specifically, the side surface of the absorber 56 of the liquid impermeable sheet 11, or the inner surface or outer surface of the packaging sheet 58. It is desirable to do. The application pattern is not particularly limited, and it can be applied in the form of a large number of streaks as shown in the illustrated example, or in the form of a surface, a band, or the like. Of course, a sheet on which the indicator 80 is formed can be manufactured separately, and the sheet-like indicator 80 can be built in the diaper.

  When the indicator 80 is composed of ink, the component of the indicator 80 is obtained by adding a colorant to the ink. When the indicator 80 is composed of an adhesive, the water-soluble polymer or the hydrophilic polymer is made of resin or the like. To which a water-insoluble component and a colorant are added. Specific examples in the case of comprising an adhesive include a water-insoluble polymer comprising a polyethylene glycol molecular weight of 100 to 500, polyvinyl pyrrolidone, a vinyl acetate copolymer, and a water-soluble polyester. And a colorant that indicates the acidity / alkaline degree (pH) of the liquid in contact by color change.

When the indicator 80 is constituted by an adhesive, various known adhesives can be used as the adhesive. As an example, the case where a hot melt adhesive is used will be described in detail. By using a hot melt adhesive containing a colorant as the indicator 80, the colorant can be prevented from diffusing and leaching, and the sheet-like shape can be prevented. Compared with the case where the indicator is provided, since it can be easily performed in-line, the indicator attaching work process can be greatly saved. At this time, the application amount of the indicator hot melt adhesive is preferably 15 to 40 g / m ² . When the amount is less than 15 g / m ² , the function as an indicator is impaired, and when it is more than 40 g / m ^2, a feeling of stickiness due to the curing of the adhesive occurs.

  On the other hand, when the indicator 80 made of a sheet-like member is used, the sheet-like member is placed between the liquid-impermeable sheet 11 and the absorbent body 56, specifically, between the absorbent body 56 and the inner surface of the packaging sheet 58. Alternatively, it is arranged between the back surface of the packaging sheet 58 and the liquid-impermeable sheet 11. When this sheet-like indicator 80 is used, the number of members is increased as compared with the case where the liquid indicator 80 is applied and provided, but it can be easily used in a necessary amount in a necessary portion. Thus, the cost can be reduced by reducing the use area of the sheet-like member including the indicator reaction means.

(Skin care products, etc.)
Characteristically, as shown in FIG. 7 in addition to FIGS. 1 and 3, the surface sheet 30 (skin contact sheet) contains a skin care agent c, and has a convex surface and a concave back surface. A large number of 31 are provided at intervals, and a portion between the protrusions 31 does not contain the skin care agent c or contains a smaller amount of the skin care agent c than the protrusions 31. A large number of depressions 32 having convex shapes are provided. And in the protrusion part 31, the surface sheet 30 spaces apart from the intermediate sheet 40, and in the hollow part 32, the surface sheet 30 and the intermediate sheet 40 are joined (it may just be in contact). Therefore, since the skin care agent c is contained in the protruding portion 31 that easily comes into contact with the skin in the topsheet 30, the skin care agent c can be brought into contact with the skin more reliably. Moreover, since the hollow part 32 of the surface sheet 30 does not contain the skin care agent c or contains a smaller amount of the skin care agent c than the protruding part 31, the skin care agent c for the portion that is difficult to contact the skin. Useless use can be reduced. And since the protrusion part 31 of the surface sheet 30 is spaced apart from the back side sheet | seat, and the skin care agent c contained in the protrusion part 31 is difficult to pass through, many of the added skin care agent c can be contacted with skin. Can do. On the other hand, since the hollow portion 32 of the topsheet 30 is joined to the intermediate sheet 40, the topsheet 30 is securely fixed, and excreta and the like are efficiently transferred to the intermediate sheet 40 via the hollow portion 32 of the topsheet 30. It comes to be handed over well.

  The shape and arrangement of the protrusions 31 can be determined as appropriate. For example, the protrusions 31 having a geometric shape such as a linear shape, a curved shape, a wavy shape, a circular shape, an elliptical shape, a trapezoidal shape, and a weight shape are regularly or irregularly formed. In addition to the arrangement, the projecting portion 31 can form a satin or various picture patterns. In addition, the shape and arrangement of the depressions 32 can be determined as appropriate. For example, the depressions 32 having a geometric shape such as a linear shape, a curved shape, a wave shape, a circular shape, an elliptical shape, a trapezoidal shape, and a weight shape can be regularly or Although it is possible to arrange them irregularly or to form a satin or various patterns with the protrusions 31, it is desirable that almost the entire portion between the protrusions 31 is the recess 32.

  The skin care agent c can be contained over almost the entire surface sheet 30, or can be contained only in part. Moreover, as long as the skin care agent c is contained in at least some protrusions 31, you may have the protrusion part 31 which does not contain the skin care agent c, and the hollow part 32 containing the skin care agent c. In other words, the protruding portion 31 and the recessed portion 32 may be formed in a wide range such as the entire surface sheet 30 and the skin care agent may be included in a range including the protruding portion 31 of a part thereof.

  In the example shown in FIG. 1, the surface sheet 30 is provided with a plurality of regions containing the linear skin care agent c extending in the front-rear direction at intervals in the width direction. A large number of protrusions 31 and depressions 32 as shown in FIG. 7 are provided between the containing regions, and at least the protrusions 31 contain the skin care agent c. In FIG. 1 and FIGS. 8 to 10, the black spot in the skin care agent c-containing region is assumed to be the protrusion 31, and the white portion is assumed to be the depression. In the case of the inclusion pattern shown in FIG. 1, an absorption structure is provided that delivers excrement to the back side through the recess 32 while diffusing excrement in the front-rear direction by the liquid permeability lowering function of the skin care agent c. The width of each skin care agent c-containing region is preferably about 0.1 to 65 mm. In addition, the skin care agent c-containing region may be provided only in the front-rear direction intermediate portion in addition to the entire length of the topsheet 30. Furthermore, the containing region of each skin care agent c may also be provided intermittently in the form of dotted lines in addition to extending continuously. In addition, the width, length, and interval of each skin care agent c-containing region need not be uniform.

  Further, as shown in FIG. 8A, the skin care agent c can be contained in a lattice shape. This inclusion pattern is preferable in that there is little risk of deterioration in air permeability and absorption performance by the skin care agent c, and the skin contact area of the skin care agent c can be widened. In addition, this grid | lattice pattern can be provided in a part besides the whole surface sheet 30, and can also be combined with another containing pattern.

  Further, as shown in FIG. 8 (b), there is a dot pattern as an inclusion pattern that lowers the influence of the absorption performance by the skin care agent c. This dot pattern can be provided on a part of the surface sheet 30 as well as on a part of the surface sheet 30. In combination with other inclusion patterns, for example, a part with less fog is included in a dot shape, and a part with much fog is It can also be contained in a denser pattern.

  Further, since the portion of the surface sheet 30 along the leg circumference and the waist side end portion are portions where skin troubles such as rash easily occur due to friction with the skin, as shown in FIG. If the c-containing region is provided, it is possible to more effectively prevent rash. This inclusion pattern can be combined with other inclusion patterns.

  Furthermore, as shown in FIG. 10, when the skin care agent c is contained not only in the portions along the front and rear legs but also in the X-shaped region including the crotch portion connecting them, the portion ( The skin care agent c can be disposed in the vicinity of the buttocks / urination port), which is preferable. In this case, the skin care agent c does not need to be contained in the portion along either the front or rear leg. This inclusion pattern can be combined with other inclusion patterns.

  In the containing region of these skin care agents c, the depression 32 may not be provided, but it is preferable that both the protrusion 31 and the depression 32 are provided, and in that case, the depression 32 is provided in the depression 32. Although the skin care agent c may be contained, it is preferably not contained or low in content.

The skin care agent c, can be used particularly without limitation any known, for example, a petroleum-based emollients, fatty acid ester emollients, alkyl ethoxylate emollient, fatty acid ester ethoxylates rate example Moriento, fatty alcohols emollient, and mixtures thereof Although a thing can also be used, the tocopherol homologue known as vitamin E group described in Unexamined-Japanese-Patent No. 2000-110067 is especially suitable. In this case, it is preferable to include the tocopherol homologue in the topsheet 30 so that the α-type tocopherol adheres to 0.001 part by weight or more with respect to 100 parts by weight of the topsheet 30. Furthermore, the proportion of α-type tocopherol in the tocopherol homologue to be applied is desirably 90% or more.

  The skin care agent c may be hydrophilic or hydrophobic, but if a hydrophobic one is used, there is a risk of affecting the absorption performance of the contained portion. As shown in the example, when it is contained only in a part, a non-containing region is provided, and at least the dent 32 is provided therein, excrement is transferred to the back side through the dent 32, thereby suppressing the decrease in liquid permeability. it can.

  The skin care agent c to be used may be one type or a plurality of types. In the latter case, a plurality of types of skin care agents c may be used in combination, or different types of skin care agents c may be used depending on the position of inclusion. it can.

  The part containing the skin care agent c can contain a fixing agent for the skin care agent c. However, since there is a risk of skin irritation by the fixing agent and a decrease in flexibility, it is preferable not to contain it at all.

  The formation method of the protrusion part 31 and the hollow part 32 of the surface sheet 30 should just be selected suitably, and besides forming an unevenness | corrugation by embossing, an unevenness | corrugation can also be formed by sticking and heating a heat-shrinkable sheet. When forming unevenness by embossing, when the embossing is performed so that the back side of the top sheet 30 is on the convex roll side of the embossing roll, the protruding portion 31 is formed by the protruding portion of the convex roll, and the fibers of the protruding portion 31 This is preferable because the density is higher than the fiber density of the recessed portion 32, the holding power of the skin care agent c in the protruding portion 31 is improved, and the back-through and movement to the surroundings (the recessed portion 32) are less likely to occur. Although the difference in fiber density can be determined as appropriate, it is preferable that the fiber density of the protruding portion 31 is 1.1 times or more the fiber density of the recessed portion 32. On the contrary, embossing can also be performed so that the front side of the topsheet 30 becomes the convex roll side of the embossing roll, and in this case, the recess 32 is formed by the convex part of the convex roll. In this case, there is an advantage that the bottom rear surface of the recessed portion 32 of the surface sheet 30 is reliably brought into contact with the intermediate sheet 40 by performing embossing in a state where the surface sheet 30 and the intermediate sheet 40 are overlapped. In addition, when performing embossing, it is preferable to set it as the embossing (heat embossing) accompanied by the heating in the temperature which does not impair the texture of the surface sheet 30, Preferably about 70-160 degreeC.

  Moreover, when forming the surface sheet 30 which has an unevenness | corrugation by heating a heat-shrinkable sheet, the intermediate sheet 40 with larger heat-shrinkability is intermittently bonded to the surface sheet 30 and heated (heat embossing). In addition to performing intermittent lamination and heating at the same time as in processing, including a form in which heating is performed by hot air after lamination by intermittent application of a hot melt adhesive or the like), surplus of the surface sheet 30 due to contraction of the intermediate sheet 40 The portion becomes the protruding portion 31. In this embodiment, a non-shrinkable sheet having no heat shrinkability is used as the top sheet 30, and a heat shrinkable sheet can be used if the amount of heat shrinkage is smaller than that of the intermediate sheet 40.

  Further, an elastic stretchable material is used for the intermediate sheet 40, and the non-stretchable topsheet 30 is stacked in an extended state by being pulled and stretched in at least one of the longitudinal direction and the width direction, and intermittently by adhesive or heat embossing or the like. After the lamination, the surface sheet 30 may be uneven by releasing the tension of the intermediate sheet 40. As the intermediate sheet 40 in this case, for example, an elastic stretchable nonwoven fabric or a mesh-like or net-like elastic stretchable member can be used.

  On the other hand, the skin care agent c is applied in advance to at least a part of the protrusions 31 by a known application method such as roll transfer after the surface sheet 30 is formed with an uneven surface. It is also possible to apply the skin care agent c to an embossing roll such as a roll and transfer it to the surface sheet 30 during embossing.

(Other)
The skin contact sheet of the present invention is not limited to the surface sheet 30 as long as it is exposed on the inner surface so as to come into contact with the skin, and may be, for example, a barrier sheet 62. In this case, the back side member is liquid impermeable. It becomes the sheet 11 or the exterior sheet 12.

  INDUSTRIAL APPLICABILITY The present invention can be used in general for absorbent articles such as pants-type disposable pads, pad-type disposable diapers, sanitary napkins, as well as tape-type disposable diapers.

  DESCRIPTION OF SYMBOLS 11 ... Liquid impervious sheet, 12 ... Exterior sheet, 30 ... Surface sheet, 40 ... Intermediate sheet, 50 ... Absorbing element, 56 ... Absorber, 58 ... Packaging sheet, 60 ... Side barrier cuff, 62 ... Barrier sheet, 70: Dorsal elastic sheet, 74: Target sheet, 80: Indicator.

Claims (7)

It comprises a skin contact sheet made of a nonwoven fabric and a back side member provided on the back side of the skin contact sheet,
The skin contact sheet contains a skin care agent, and a large number of protrusions having a convex surface and a concave back surface are provided at intervals, and the skin care agent is not contained in the portion between the protrusions or the protrusions. Containing a smaller amount of skin care agent than the part, the surface is concave and the back is convex, a large number of depressions are provided,
The skin contact sheet is spaced apart from the back side member at the protruding portion, and is in contact with the back side member at the recess.
An absorbent article characterized by the above.   The absorbent article of Claim 1 whose fiber density of the said protrusion part is higher than the fiber density of the said hollow part.   The absorbent article according to claim 2, wherein the skin contact sheet does not contain a fixing agent for fixing the skin care agent to fibers. A liquid-permeable surface sheet, a liquid-impermeable sheet, and an absorber provided therebetween,
The absorptive article according to claim 2 or 3 in which said skin contact sheet is said surface sheet, and said skin care agent is hydrophobic. The surface sheet is provided with a plurality of linear skin care agent-containing regions extending in the front-rear direction at intervals in the width direction,
The absorbent article according to claim 4, wherein at least the protrusions are provided at least in the skin care agent-containing region, and at least the depressions are provided between the skin care agent-containing regions.   The absorbent article according to claim 4 or 5, wherein a skin care agent is contained in at least a portion along the circumference of the leg of the surface sheet, and at least a plurality of the protrusions are provided in at least the skin care agent-containing region.   The absorption according to any one of claims 4 to 6, wherein a skin care agent is contained in at least a waist side end portion of the surface sheet, and at least a large number of the protrusions are provided in at least the skin care agent-containing region. Sex goods.

Images